The HC-800II is discontinued in favor of the Nagaoka AM-804

"Dirty tape heads can cause poor sound recording and reproduction. And dirty pinch rollers and capstans can result in uneven tape speeds and broken tapes. However, clean heads and clean tape paths allow you to expect the widest range of sounds without loss from your tape deck. Clean heads also extend the lives of both the heads and the tape. ... KEEP OUT OF REACH OF CHILDREN. Contents 14ml per bottle. "

One bottle is a rubber cleaner/preservative agent. The other is a head cleaner agent; presumably an alcohol. Bottles are GLASS. Cotton swaps are industrial quality; tightly bound. Can be used for any type of audio tape machine by qualified personnel. Including but not necessarily limited to reel to reel, cassette tape and mini cassette tape playback and recording devices. Not for use on video heads.

CONTAINS UNSPECIFIED CLEANING CHEMICALS USE IN WELL VENTILATED AREA. USE EYE AND SKIN PROTECTION.